【摘要】 为揭示高层建筑群间相邻结构动力相互作用机理和结构行为变化,设计2个土-结构体系对照模型,在场地土条件相同的情况下,一个仅有单独的上部结构、另一个则包含5个上部结构,并分别进行振动台试验,获取上部结构关键部位在地震动激励下的反应。试验结果显示:在地震作用下,高层建筑群内结构存在明显的相互作用,群体建筑的沉降和倾斜较单独建筑增大;相邻建筑的存在会使上部结构频率降低;相邻建筑的相互作用使上部结构加速度反应和位移反应有时增大,有时减小,此变化取决于输入地震波的频谱特性;建筑群内中部建筑的加速度和位移反应强于周围建筑。更多还原

【Abstract】 To reveal the mechanism of dynamic cross effect and the structural behavior change caused by adjacent buildings,two comparative models of soil-structure system were designed. Under the same site soil conditions,one model included a single upper structure,and the other included five. Two shake table tests were carried out to obtain the reaction of the critical parts of the structures under the ground vibration excitation. The results showed that under earthquake,there is a significant interaction among the structures inside highrise building group. The settlements and the tilts of group buildings increase over the separate one. The frequency of the structure decreases because of the existence of adjacent buildings. The adjacent buildings make the acceleration response and the top displacement of the structure increase or decrease,which depends on the input seismic waves. The middle building’s reaction of acceleration and displacement are stronger than the surrounding buildings.更多还原